Extreme Networks Px Series Spécifications télécharger pdf (Page 69)

Px Series Application Switch Installation and Configuration Guide 6-11

Persistence Modes

Unlike self-identifying cookie persistence and hashed cookie persistence, learned cookie

persistence does not require the website administrator to make any changes to the

website. Learned cookie persistence is a best-effort persistence mode that creates a

short-term stickiness between the client and the web server.

Figure 6-4 illustrates learned cookie persistence mode.

Figure 6-4: Learned cookie persistence mode

The following transactions occur in Figure 6-4:

• The website administrator configures the Px series application switch to use learned

cookie persistence mode, and configures the name of the cookie to be tracked.

• The client at IP address 65.11.11.11 transmits its first TCP request (A) to

www.buystuff.com at its publicly-known VIP address, 64.1.1.7.

• The Px series application switch responds (B) on behalf of 64.1.1.7, and the three-way

TCP handshake is established between the client and the Px series application

switch.

• Using its configured load balancing policy, the Px series application switch selects

one of the web server. In this example, server 3 at IP address 10.1.1.3.

WS_004

Client

65.11.11.11

Cookie:

sessionID=37654

Server 1

10.1.1.1

Server 2

10.1.1.2

Server 3

10.1.1.3

64.1.1.7

www.buystuff.com

1 2 ... 64 65 66 67 68 69 70 71 72 73 74 ... 117 118

Pas de commentaire

Extreme Networks Px Series Spécifications Page 69